A lot of the JK's came with a 30/35 combo and crappy gears, 3.21 I think, so this would be a great upgrade..I just got my hands on but I am not going to do the project I got them for. So For Sale both are complete with brakes and ABS wires, sensors. JK Dana 30 front Axle with a Detroit Truetrac and 4 .10 gears. With 8000 miles $600.00 Or with the D44 it is an open diff with 4.10's and good brakes, can't remember now but it has less than 15k miles on it. If you want D30 & D44 together, instant upgrade to a 44 and 4.10's $1000 Together! All you need is an rear Aussie, Truetrac or something and you have an instant upgrade for a great price.. local pick up only Davie Florida.